Prime Minister of Australia Malcolm Turnbull tweeted a video on Monday saying his country has achieved a "commitment" from President Trump that his tariff plan on steel and aluminum won't apply to exports from Australia. Mr. Trump signed proclamations for his new steel and aluminum tariffs last Thursday -- 25 percent on steel imports and 10 percent on aluminum imports -- which will go into effect in a little over two weeks.

"This is very important for the thousands of people who rely on these industries for work," Turnbull tweeted. "This is a win-win decision," he said in his video message.

Alluding to the breakthrough, while not explicitly naming Mr. Trump, he said, "You've got to keep at it, you have to be relentless and if there's a setback, you just keep going find another approach."

On Friday, Mr. Trump tweeted that he had spoken with Turnbull over the phone and that he was "committed to having a very fair and reciprocal military and trade relationship."

He added, "Working very quickly on a security agreement so we don't have to impose steel or aluminum tariffs on our ally, the great nation of Australia!"

Spoke to PM @TurnbullMalcolm of Australia. He is committed to having a very fair and reciprocal military and trade relationship. Working very quickly on a security agreement so we don’t have to impose steel or aluminum tariffs on our ally, the great nation of Australia!